Journal for pulverizing rollers



Aug; 5, 1930. w. VOGEL 1,772,120 l JOURNAL FOR PULVERIZING ROLLERS 1. iilllnh 5L g. 1J n E w d mwa npw y 2 Sheds-Sheet 2 Ff orngys Aug. 5, 1930. w. VQGEL.,

lJOURNAL FOR PULVERIZING RoLLERs Filed Feb. e, 192e Kd A f Patented Aug. 5V, 1930 'unir-an srArEs .PATENT or-Fica WILLIAM voenr., or -riIGHLAnn PARK,

vILD-fliers, ASSIGNOR ,rd THE RAYMOND.

BROTHERS IMP-ACT PULVEBIZER CO., OF CHICAGO, ILLINQIS A C013,1ORA'lYICVlSTv OF ILLINOIS Applicatiamea February e, ieee. serial No. 252,237.'

This invention relates to improved means for rotatably supporting, and lubricating the bearings of, a pulverizing roller for a grinding or pulverizing mill of the general type shown, for example, in thewpatent to Raymond et al., 1,57 3,191, granted February 16, 1926. In a mill of this type, a plurality of pulverizing rollers are pivotally suspended in a vcircular series vfrom a rotating frame or spider, the rollersswinging out-by centrifugal force against the inner surface of Va fixed circular bull ring, whereby the material caught between the ring and rollers is pulverized. The present invention relates to an improved form of journal support forone of these rollers, in Combination with improved means Afor lubricating the bearings between the fixed supporting shaft' the rotatable assembly. v y Y,

One object of this invention is to provide improved means for rotatably mounting and supporting a pulverizing roller from a nonrotatable shaft suspended inta substantially upright position. f I

lAnother object is to provide improved sealing means' for preventing the excessive escape o f oil or other lubricant between the non-rotating supporting shaft and the rotating assembly.

Another object is to provide improved means for maintaining anupward flow of oil through the several bearings between the rotatable assembly and the supporting shaft.

Other objects and advantages of this invention will be more apparent from the following detailed description of certain approved forms ofv apparatus involving the principles of the invention. y

In the accompanying drawings:

Fig. 1 is a central vertical section through one approved form of the" assembled apparatus. y'

Y Fig. 2 is an enlarged horizontal section taken substantially on the-line 2 2 of Fig. l.

Fig. 3 is a view, similar to Fig. l, showing end of the shaft than the upper end. The

a modification.

Fig. 4 is an elevation, on a somewhat smaller scale, of Fig. 3. v l

At 1 is shown a portion of the'rotating the form of roller shown, in

Jounivanronrunvnnrzrne Rennens spider of the 'roller mill, on which is formed a yoke comprising the parallel larms 2 and' 3,

'in' whichA are pivotally mounted the ends lof the trunnion shaft 4. 'The rocker 5 comprises two split collarspositioned at right angles tol one another, the collar 6 being clamped about the trunnion shaft 4 by means of boltsl8'and the collar 7 being clamped about the upperr portion of roller-supporting shaft 9 bly means of boltslO. -Akey 11 fitting matinggrooves or recesses in the collar 7 and shaft 9 prevents relative rotation between the shaft 9 and the Arocker 5. Av split vring 12 is adaptedl to v,fit Vpartially within an annular groove 13 Yin shaft 9, the projecting portion of ring 12 restinor againstv the upper surface ofthe rocker 5.

collar 14j which surrounds the shaft 9 and is secured to the uppe'r vend of rocker '5-'by bolts 15, fits over the projecting portion of ring 12,whereby longitudinal movement of shaft 9 through thero'c'ke'r 5 in either directionis prevented.' Y i, f

A passage `16 f or'oil or otherlubricantextends axially'throughout thelength of shaft 9,-the upper portion of this` passage being en'- larged at 1 7 to' form a lubricant reservoir, at the lower end of which is placed the oilscreen 18. The upper end of chamber 17 is closed by the screw plug 19, in which is placed a smaller plug 2O which maybe removed for the insertion of lubricant.y In Fig. 1 we have indicated a flexible conduit 22, the end of which connected at 28v with a passage tapped into one side of the reservoir 17 whereby a central lubricating system vmay be utilizedffor feeding oil to allof the Vindividu'al rollers of the mill.v Acentral lubricating system adapted vesliecially for this purpose is vdisclosed and claimed in the copending application of C rites, `Serial No. 252,228, 7led February 6, 1928, Y y l y, 'A

An outwardly vprojecting roller-.supporting y collar 24 is formed on shaft9 at a point intermediate its length, inthe example here shown this collar being positioned nearer the lower and in this chamber 26Wis secured the bushing 27 adapted to rotatably engage the shaft. An

' to provide an annular chamber'34 above the collar 24. The'outwardly projecting flangeat the bottom of skirt 33 engages the upper surface of pulverizing roller 25 and is secured thereto by means of a series of boltsi36,where by the roller is suspended from the housing 31. A pair of thrust rings 37, 38, which carry the loadfare positioned in the annular cham-Y ber 34,fthe ring 37 being secured by pins 39 'to the` housing 31, and the ring 38 being secured uby pins 40 to the upper surface `of collar 24.

`-'I`he `upper end of sleeveor housing 31'is hollowed out at `41V to Areceive the bushing sleeve42 which hasan enlarged head 43 secured lto the upper end of sleeve 31 by a series of Screw bolts 44. i A sleeve o-rbushing 45 of chromium plated metal surrounds the shaft 9 and has an outwardly projecting` flange 46 -at its. upper 'end secured'by screwbolts 47 to the lower surface of rocker. 5. 'Ihelowerend of sleeve or bushing45 'projects partially into a correspondingly shaped annular recess .48.

in thebushing'42. An annular gland 49 projects into a correspondingly shaped Vrecess in fthe head 43 of bushing42 to engage a packing ring 50. By adjusting the nuts 51 on a series ofscrew bolts 52, the gland 49 may be forced ,down to expand the packingrin'g 50 and force same into sealingen'gagementwiththe bushing 45 onthe non-rotatable shaft 9. The hard sleeve 45 protects shaft 9 from the wear of the gasket 50 andr gland 49. Sleeve 45 may be re- .placedv when worn, but will last for a long 'period of time. It will be noted that the lower end of ysleeve 45 does not project to the bottom of annular space 48" in 4bushing 42, so that an annular oil collecting chamber remains beneath the sealing ring 50, vthis `space being connectedby a radial passage 53 with the lubricant conduit 16 inthe shaft 9.V It will be vnoted that the passage 53,V is positioned on ""f the outer side of shaft9,thatxis the side away from the centerA 'about whichthe spider 1 rotateswhereby centrifugal force willtend to .cause oilto flow outthrough vpassage 53 into the annular channel 48. .c Y y A screwlplug 54 in the bottom of the roller 25 permits access, if desired, toA the :lubricant well 'Y Y. j

In operation, the oil or other llubricant, in reservoir l7'and conduitor passage 16 will flow downvinto the well-3(1), and thence will work its way up along the bearing surface between bushing 27 andv shaft 9.' This up ward movement of the oil film'around the shaft 9 is caused partly by the pressure of the'head of oil in conduit 16, partly by the cen trifu'gal action ofthe oil in well 30, and is vperhaps aided by capillary action. This oil film vwill travel up around the collar 24 between the thrust rings 37 and 38, and upbetween shaft [9 vand bushing 42 into the annular oil. collecting chamber 48. A very small amount of kthis oil will escape past the sealing vgasket 5() A'and gland 49. rlhe object of this sealing .means is to prevent the excessive' loss of oil or other lubricant, butit is desirable that there be a slight out-flowof oil in order to prevent eXcess'ive wear ofthe gasket and gland and to combatthe entrance of dust through this joint.

Vhen the roller is ati rest, the head2 of oilin passagek 16 will cause an Voutward flow throughpassage 53 to initially lubricaterthe sealing-means and'bushing '42.' After the -roller is in operation the upward flow ofoil Voutside the shafty will Vtend to counteract the outward flow through passage 53,L so that there will ordinarily be nomaterial movement of oil through this passage. 1

The modification shown in Figs. 3 and V4 ydiffers only in certain details' fromjtheV preferred .form already described, those features which are common toy both modifications not being' further lalludedto. In `this case, the split collar 7 of rocker 5 is omitted,I and the upper end of shaft 9 is formed with-'a tapered Aportion 55k yadapted to be -drawn--uptightly into a vcorrespondingly tapered opening 56 in the rocker 5, by means of a nut "5 7 threaded onto the reduced upper end portion v5,8` of shaft 9.- Lock nut 59A holds the parts in engagement. In this form of the invention the reservoirf17 has been omitted,:the,conduit 16 extending continuously throughout the length of the shaft and opening into the well 30 at itslower end and being Vclosed by plug4 60 at its upper end. `In this-simplified form of assembly the bushing 45 has been omitted, the gland 61 engaging directlyfwith shaft 9 above the gasket 50. Instead of having the bolts 36 pass completely through the pulveriz ing roller, as shown in Fig. 1,v the roller 62 is providedA with an outwardly projecting flange 63 at itstop, engaging beneath theflange 35 on sleeve v31,.lhe flanges 35and 63 lbeing con nected by a series'of bolts `64 whereby the roller 62 is suspended.

I claim: Y 1. In an apparatus of the character described, ya shafaineans Vin which the upper portion ofthe shaft is'lsecured, for suspending the shaft in a substantially upright position,

theshaft having a lubricant passage extending substantially axially th-erethrough,"there being any annular .outwardly projecting col* lar .on the shaft ata location intermediate its length, a roller formed to `rotate on'the lower l,portion of the shaft beneath theA collar, there being' a lubricant well formedin the roller below the lowerA end of the shaft, a supporting sleeve rotatable on the shaft above the collar, means for securing the roller to the sleeve, and a sealing means betweenthe upper end of they sleeve and the shaft. l

the shaft in'a substantially upright position,

the shafthavingalubricant passage extendingsubstantially axially therethrough, there being an annular outwardly projecting collar on the shaft at a location intermediate lits length, a roller formed to rotate on the lower portion of the shaft beneath the collar, there being a lubricantvwell in the roller below the lower end of the shaft, a supportingsleeve rotatable on the shaft above the collar, means for securing the roller to the sleeve, a sealing means between the upper end of the sleeve and the shaft, said sealing means comprising a bushing secured to the sleeve, a gland carried by the bushing and adjustable into the upper end thereof, and a gasket clamped between the gland and bushing, there being a lubricant duct extending from the outer surface of the shaft below the packing to the central lubricant passage. Y

3. In an apparatus of the character described, a shaft, means in which the upper portion of the shaft is secured for suspending the shaft in a substantially upright position,

the shaft having a lubricant passage extending substantially axially therethrough, there being an annular outwardly projecting collar on the shaft atv a location intermediate its length, aroller formed to rotate on the lower portion of the shaft beneath the collar, there being a lubricant well in the roller below the lower end of the shaft, a bushing secured in the roller and having a cylindrical portion engaging the shaft and an upper annular flange engaging the lower face of the collar, a supporting sleeve rotatable on the shaft above the collar, they sleeve having a skirt projecting downwardly about the collar and secured to the roller, a pair of thrust rings adapted to engage with one another and secured one to the upper surface of the collar and the other to the lower surface of the supporting sleeve, and a sealing means between the upper end of the sleeve and the shaft.

4. In an apparatus of the character described, a shaft, means in which the upper portion of the shaftis secured for suspending the shaft in a substantially upright position, the shaft having a lubricant passage eX- tending substantially axially therethrough, there being an annular outwardly projecting collar on the shaft at a location intermediate its length, a roller formed to rotate on the lo'wer portionv of the shaft beneath the collar, there being a lubricant well in the rollerbelow the lower` end of the shaft, a bushing secured'in the roller and having a-cylindrical portion engaging the shaft and an upper annular flange engaging the lower face of the collar, a supporting sleeve Vrotatable on the skirt projecting downwardly-about thecollar and secured to the roller, a pair of thrust rings `adapted to engage with one anothery and secured one to the upper surface of the collar andthe other to the lower surface, of the sup.- porting sleeve, a sealing means between .the upper endv of the sleeve and thefshaft, said sealing means including abushing mounted in the upper end of the sleeve, av gland tele- 'scopically fitted within an annular chamber inthe upper portion of the bushing and a gasketjconlined between the gland andy bushing, there being an annular chamber in the bushing beneath the gasket and a lubricant duct in the shaft connecting the central lubricant passage with this latter chamber.y n

V5, In an apparatus'of the Characterdescribed, a shaft, means in which the upper portion of the shaft is secured for suspending the shaft in a substantially upright position, there being an annular outwardly projecting collar on the shaft at a location intermediate 'its length, a roller formed to enclose the lower end ofthe shaft beneath the yshaft above the collar, the sleeve having a collar and rotate .about the shaft, a, supporty, l

ing 'sleeve rotatable on the shaft above thev collar and supported by the collarannular bearing'means :surrounding the shaft and inte'rposed between the sleeve and collar, the

sleeve Vhaving Va downwardly projecting skirt terminating in an. outwardly projecting flange, and means for securing the flange to the upper surface of the roller. y,

6. In anrapparatus of the character described,'a trunniony shaft,`means in Awhich. the ends of the trunnion arev pivotal'ly supported, a rocker comprising two split collars'positioned at right angles to one another, one

.of the collars being clamped about the trunnion shaft, a Vroller-supporting shaft' the up.- per portion of which is clamped in the' other collar, a ring secured in" the upper .portion oftheshaft and engaging the upper surface of the rocker-collar in` which the shaft :is clamped, an annular member encircling .the shaft above the ring and secured to the collar, a pulverizingroller, and means for rotatably supporting the roller Vupon the lower portion of thev shaft. .j

7, In' an' apparatus of the characterl described, a shaft, La split housing-,means for clamping the housing 'about the upperiportion of the shaft, means forpivotally supporting the housingv so that` the shaft and housing are-free to swing in fa vertical plane, a projecting annular flange adjacent the upper end of the shaft and enga-ging the upper sleeve. v

surface ofthe housing,an annular'member encircling the shaft above the flange `and secured to the housing, therebe'ing an outwardly projecting collar on the shaft at a 'location intermediate its length, a' roller tion? of 'the shaft, means for pivotallysupportingthe housingso 'that the shaft and housing are free to swing in a vertical plane, a projecting annular flange adjacent the upper 'end ofthe shaft and engaging the upper *surface of the housing, an annular'member encirclingthe shaft above Vthe flange and secured to the housingthere being a lubricant one to thev upper surface vof the collar and the Y other to the lower surface' of the supporting` sleeve, and a packing means at the upper end of the sleeve y'comprising a bushing mounted in the upperend of the sleeve about theshaft,

a gland: telescopically fitting within an annular chamberl in the upper `portion of the bushing and a gasket confined between the Y gland and the bushing and engaging the shaft, there .being anl annular chamber in the -bushing'beneath the gasket and alubricant duct inthe shaftc'onnecting the central lubricant passage vwith .the latter chamber.

.Y WILLIAM VOGEL.

cavi-ty in the upper portion of the shaft and Y al lubricant passage extending substantially axially of the shaft from the cavity tothe Y lower Vend of the shaft, Van oilstrainerin the 'F l .cavity,therefbeing an outwardly projecting collarfon theshaft at a locationI intermediatev s Vits length, a rollerr formed to rotate: on the lowerifportion ofthe eshaft beneath the coli.; i lar, therebeing a lubricant well'formed in the vroller below the lower endof the shaft, a supporting sleevevrotatable'onthe shaft above Y lthe'collar-means forsecuring the roller to the sleeve, and a packingmeans betweenthe upper end of the sleeve and the shaftu 'Y 9 In an apparatus of the character described, a shaft, a split housing, means for clamping the housing about the upper prytion vof the shaft, means forvpivotally supporting the housingv so that the shaft 'and housing are free to swingy inV a vertical lane 23 2D 7 a projecting annular flange adjacent the upl per endof'the shaft and engaging the upper surface of the housing, an annular clamping member-encircling the shaft above the flange and secured tofthe housingjtherebeinga lubricant cavity' inthe .upper portion of the shaftand; a lubricant passage extending. substantially axially of the-shaft from .the cavity tothelower end of the shaft, an oil strainer in the cavity, j there Ibeing `an outwardly proectingv collar onr the shaft "at a' location `intermediate itslength,- a roller formed to rotate on the lower portion of the vshaft beneath the bushing secured in the roller and having a cylindrical .portion engaging the shaft and an upper annular flangeengaging the lower face of'the collar, arsupportingeleeve rotatable on the shaft above the collar, the sleeve having a skirt- `projecting downwardlyl about the collar, means for ysuspending the roller l from this skirt, a pairlof thrustringsvadapt- I ed to engage lwithone another and secured collar, there beingk adubricant ywell inthe -roller .,belowathe lowerv end of the' shaft, a 

